Hey All, I had a few questions regarding an upcoming revamp of the audio in my car. I have decided to go with Polk 5X7's in the front and also the rear of the car. http://signature.crutchfield.com/s_1...571.html?tp=93 my question is I know we have 8" subs in both doors on the shaker 500 has anyone thought to upgrade those or possibly put two subs in the trunk and hook up an amp to it? If so how hard was it to get behind the HU to hook up the amp?

 

Also, Ive heard of people using a crutchfield adapter/harness for the speaker install. Can someone direct me to that item that is sold on crutchfield if i need it to complete the install.